chore(deps): update dependency testcontainers to 4.8.1 (#491)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

test/OpenFeature.Contrib.Providers.Flagd.E2e.Common/OpenFeature.Contrib.Providers.Flagd.E2e.Common.csproj

@@ -19,7 +19,7 @@
     <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="8.0.0" />
     <PackageReference Include="Reqnroll.Microsoft.Extensions.DependencyInjection" Version="2.4.1" />
     <PackageReference Include="Reqnroll.xUnit" Version="2.4.1" />
-    <PackageReference Include="Testcontainers" Version="4.4.0" />
+    <PackageReference Include="Testcontainers" Version="4.8.1" />
   </ItemGroup>
 
 </Project>